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Reckon my grind would benefit from the clumps being broken up prior to tamping?
I'd say so, something as simple as a paperclip, safety pin or something and just stir it around.
To be fair, I've never used had a grinder that produced clumps, so can't speak for the improvement with any personal experience. But it should definitely improve extraction and reduce the chances of channelling.
Out of the grinder:
Bonk the tamper against the side of the portafilter to level the coffee:
Tamped (no McCarthy bonk):
Reflectoporn:
Coffee:
Reckon my grind would benefit from the clumps being broken up prior to tamping?